While I think that Elhokar is on his way to becoming a Radiant, I don't have a good feeling about those spren. They seem to bring out a worse side of Elhokar, and I think they are deliberately feeding his paranoia. They disappeared when Kaladin arrives, and Kaladin is one of the most hero-y characters in the book.
So, Yes, I think Elhokar will be a Radiant, but those spren are giving off some seriously bad vibes, dude.